i'm quite new to this forum, so i hope this is the proper place to put this up:)
as the title suggests: I'm having problems with my serial connection when i include the servo library.
I'm currently working on a C# library for communicating with the Arduino ( also made a library for arduino). just a simple protocol for data transfer between them.
so here' s the deal: i've set it up so that i have packet that looks like this
"ID" 1 byte -> for deciding what kind of packet i'm recieving/sending;
"Package Size" 1 byte -> for determing when i have received the entire package
"payload"
its working like a charm until i include the servo library.
the arduino sends my package like this (O represents an OK byte while X represents a random zero)
Which Arduino board are you using ?
Do you connect a servo motor to the board ? how ?
Could you upload you sketch between code tags ? (use the '#'-button above the text input field).
Does your library/sketch declare an array of hundreds of bytes ?
Does your library/sketch use a hardware timer ?
Servo test code that uses the hardware serial port.
// zoomkat 10-22-11 serial servo test
// type servo position 0 to 180 in serial monitor
// or for writeMicroseconds, use a value like 1500
// for IDE 0022 and later
// Powering a servo from the arduino usually *DOES NOT WORK*.
String readString;
#include <Servo.h>
Servo myservo; // create servo object to control a servo
void setup() {
Serial.begin(9600);
myservo.writeMicroseconds(1500); //set initial servo position if desired
myservo.attach(7, 500, 2500); //the pin for the servo control, and range if desired
Serial.println("servo-test-22-dual-input"); // so I can keep track of what is loaded
}
void loop() {
while (Serial.available()) {
char c = Serial.read(); //gets one byte from serial buffer
readString += c; //makes the string readString
delay(2); //slow looping to allow buffer to fill with next character
}
if (readString.length() >0) {
Serial.println(readString); //so you can see the captured string
int n = readString.toInt(); //convert readString into a number
// auto select appropriate value, copied from someone elses code.
if(n >= 500)
{
Serial.print("writing Microseconds: ");
Serial.println(n);
myservo.writeMicroseconds(n);
}
else
{
Serial.print("writing Angle: ");
Serial.println(n);
myservo.write(n);
}
readString=""; //empty for next input
}
}
Hi again thanks for the response seems i was just being silly and somehow had a line in my c# code like this
int size = Port.BytesToRead;
while (size> 0)
{....}
it shoulhave been an if statement this way i would randomly read things normaly ( if 1 byte was recieved ) or very weirdly (if more bytes were recieved)